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X-ray inspection of BGAs

When using X-ray to inspect BGAs, what different types of defects are found, and where in the production process does each type of defect tend to occur? (http://www.smtnet.com/forums/Index.cfm?

http://www.smtnet.com/forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=5406&

How to calculate the line capacity

Get a stopwatch & time your functions to see which is the slowest. I am guessing it's going to be the oven, printer (if using paste inspection) or the AOI. If you are talking the average or optimum speed in CPH, that would depend on the type of board & layout.

http://www.smtnet.com/forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=9851&

Solder Cracks

Finding and troubleshooting cracked BGA solder connections are a real pain in the neck. Please describe how xray fits into this process, the type of machine used, and how that machine is used in conjunction with other equipment. (http://www.smtnet.com/forums/Index.cfm?

http://www.smtnet.com/forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=1677&

What Will I See

BGA defects observed with x-ray inspection fall into catagories. One catagory is the obvious defects; i.e. soledr bridges, missing balls, excessive solder voids. The second catagory is the more subtle "potential" defect. This is where variations in the ball bond x-ray images are observed.

http://www.smtnet.com/forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=1663&

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Tests And Measurements

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Auto-inspection for SMT

We are doing a research on auto-inspection machine used for SMT component mounted PCBA. If anyone would have more info., please give me some details. (http://www.smtnet.com/forums/Index.cfm?

http://www.smtnet.com/forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=4385&

"In-Line" Systems

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http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=2&Thread_ID=1667&mc=2&forum_idx=40

"In-Line" Systems

Software programs for SMT placement and AOI Inspection machines from CAD or Gerber. Create Assembly Sheets, 1st Article inspection, Product Tracking, etc.

http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=2&Thread_ID=1667&forum_idx=40&

Heavy BGA Inspection

We are assembling BGA [Texas Instruments (TMS320C6201)] that has metal slugs in the packaging that act as heat sinks. What are your recommendations for inspecting the solder connections on such devices? (http://www.smtnet.com/Forums/Index.cfm?

http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=2&Thread_ID=1678&forum_idx=40&

Component Damage By XRay

The xray equipment vendors have told me that xray tubes that are less than 100kV have a very low probability of damaging components. Note the "very low probability" statement - they have not seen any customer issues with xray damage but they also can't totally rule out the possibility of damage.

http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=2&Thread_ID=1674&forum_idx=40&